Emerald Platform™ Oven-Controlled Oscillators (OCXOs)

03/11/2019

Emerald Platform™ Oven-Controlled Oscillators (OCXOs)

SiTime's Emerald Platform OCXOs releases are a game-changing MEMS timing solution for 5G infrastructure applications

Image of SiTime's Emerald OXCO Timing PlatformSiTime Corporation’s Emerald Platform is the first MEMS oven-controlled oscillator (OCXO) in the industry. OCXOs offer the pinnacle of performance in timing and are critical to the reliable operation of all communications networks. However, quartz-based OCXOs are extremely sensitive to environmental stressors such as vibration, temperature changes, and shock, which can degrade network performance, reduce uptime, and impact mission-critical services such as advanced driver assistance systems (ADAS). SiTime’s Emerald OCXOs solve these problems.

As mobile operators move into 5G and edge computing, they will require much tighter time synchronization in the radio equipment, which necessitates the use of OCXOs. Prior to 5G, this OCXO was deployed in a well-controlled environment. Now, the computing, core network, and radio will be collapsed into a system that may be deployed in an uncontrolled environment such as a tower, rooftop, or lamppost. These OCXOs will be able to handle exposure to vibration and temperature extremes in these environments. Legacy quartz OCXOs are custom built from the ground up. There are severe limitations on the availability of features, such as frequencies, output types, operating temperature, and in-system control. SiTime’s Emerald Platform MEMS OCXOs do not have these limitations. Using a programmable analog architecture, the Emerald OCXO offers any frequency between 1 MHz and 220 MHz, ensuring that the customer can select the optimal frequency for their application. The device also offers two output types, LVCMOS and clipped sine-wave, for optimal board performance.

Features and Benefits
  • 10 times better dynamic stability under airflow and fast temperature ramp, ensures best system performance in harsh environments

    • ±5 ppb overtemperature stability

    • 2e-11 ADEV at 10 sec under airflow

    • ±50 ppt/°C frequency slope (ΔF/ΔT)

  • Unmatched ease-of-use, simplifying system design

    • No restrictions on PCB placement

    • No mechanical shielding needed for thermal isolation

    • Resistant to humidity

    • No external regulator needed

  • Smallest size, ideal for high density and small form factor systems

    • 9 mm x 7 mm footprint, 75% smaller

    • 6.5 mm height, 40% thinner

    • Any frequency from 60 MHz to 220 MHz

    • LVCMOS or clipped sine-wave outputs 

  • On-chip regulators, no need for external LDOs or ferrite beads

  • Semiconductor-level quality and reliability, batch to batch consistency

  • No activity dips or micro jumps

Applications
  • SONET/SDH Stratum 3E

  • 4G/5G RRH, DU

  • Base stations

  • Core and edge routers

  • Carrier-class switches

  • IEEE 1588 boundary clocks

  • IEEE 1588 grandmasters

  • Instrumentation

  • GNSS disciplined timing modules

  • Power and energy

  • Defense and aerospace

  • Long-range communications